Four Corners Mapping

Four Corners Mapping

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Cartography firm specializing in geologic hiking maps, custom cartography for print and web, and rem Four Corners Mapping & GIS is owned by Anna Riling, MS PG.

With nearly ten years of experience in GIS, she provides quality, professional mapping services to non-profits, online and print publications, and environmental consultants. Her cartography and graphic design have won multiple awards, including at the Mapping the Grand Canyon Conference, the Arizona Geographic Information Council Symposium, and GIS in the Rockies. She has presented her work using object-based image analysis to map Russian olive at the 2020 RiversEdge West conference and 2020 GIS Colorado meeting. She is on the board of GIS Colorado, runs the Durango GIS Group, and is also a licensed Professional Geologist and certificated FAA Part 107 UAS pilot.

03/21/2026

! Here is my friend's 14-year-old daughter soaking up the sun and geology on a recent backpacking trip in the Grand Canyon. My Geologic Trail Maps are packable, lightweight, waterproof, and...kid proof! www.fourcornersmapping.com/store

A River's Reach 02/23/2026

New Esri drop by Four Corners Mapping & GIS! "A River's Reach", created for the Yampa White Green Basin Roundtable, tells the unique and complex story of water in the Yampa White Green Basin in northwest Colorado, a region known for some of the last free-flowing rivers in the American West. From a wild hydrology driven by snowpack and runoff to novel water rights for fish and recreation to the collaboration of seemingly disparate water users in a time of rising drought and declining flows, this StoryMap shows the care and dedication it takes to steward water in the Basin and beyond, now and into the future.

Read the story: https://arcg.is/nKLrT0

A River's Reach Water and balance in the Yampa-White-Green Basin

10/30/2025

Hey hey, my Black Mesa Map made it into an Arizona Geological Survey at the University of Arizona post! Thanks for the opportunity to make this map, Tó Nizhóní Ání! See this map and more at fourcornersmapping.com.

A beautiful shaded relief map of Arizona’s Black Mesa (Dziłíjiin, Navajo Nation) by Anna Riling of ‘Four Corners Mapping’. The map shows the boundary of the extensive N (Navajo) Aquifer underlying Black Mesa and environs. From the US Geological Survey’s report on groundwater of the Black Mesa area (Mason, 2022) , “The geologic units associated with the N aquifer are members of the Glen Canyon Group and include the Moenave Formation, Wingate Sandstone, Kayenta Formation, and Navajo Sandstone.”.

For a larger portrayal of the Black Mesa map - https://www.maps.com/a-water-map-for-the-desert/

For Mason’s (2022) report on groundwater and surface-water of Black Mesa, see https://www.usgs.gov/publications/groundwater-surface-water-and-water-chemistry-data-black-mesa-area-northeastern-8

Photos from Tó Nizhóní Ání's post 09/04/2025
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